Bengal cats in the UK are classified based on the relationship they have with the Asian Leopard Cat, their wild ancestor. F1, F2, F3, F4, etc. are the categories. The number refers to how many generations are left from the ALC. The F1 Bengal is one generation away from ALC. It is a direct mix of an ALC and domestic cat.
The F2 Bengal, a mix of an F1 male and female, and the F3 Bengal, a mix between a domestic female and male, are the F2 Bengal and F3 Bengal. This same pattern is used to create the next generation. If you are planning to buy a Bengal cat or kitten, then you can get in touch with the Bengal kitten breeders in the UK.
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Domestic cats must be outcrossed to only female Bengals in order to create the next generation of Bengal generations. The vast majority of F1 and F2 Bengal males are infertile. This infertility may be caused by a difference between ALCs (and domestic cats) in the lengths of Y-chromosomes. This difference decreases with the fourth generation. F4 males are therefore more likely to become fertile.
Bengal kittens aren't likely to become lap cats. They are social and active, but they also love to explore new places. They enjoy playing with water, fetching, and going for walks. However, their personalities can change from one generation to the next.